On Wed, May 15, 2024 at 06:47:45PM +0800, Qian Yun wrote:
> You said before AlgebraicNumber should represent any branch
> of the root, but here we are talking about the sign of radical.
> 
> Does that mean we are taking a specific branch interpretation here?

Yes.  Othewise there is problem with meaning of 'imag'.  Also
note that this is in extra package, not in core domains. 

-- 
                              Waldek Hebisch

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